plumiReactions and basicity of amines: Edexcel International A Level Chemistry questions
Edexcel International A Level Chemistry past-paper questions on 19.1.2 Reactions and basicity of amines, 2019–2025, with mark schemes and examiner’s reports where available.
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All 27 questions on Reactions and basicity of amines, as a list
- June 2025, Unit 5, Q7 (1 mark): Which product forms when butylamine reacts with ethanoyl chloride? A ethanamide B butanamide C N-butylethanamide D N-ethylbutanamide
- June 2025, Unit 5, Q17(a)(iv) (1 mark): An aqueous solution of trimethylamine is alkaline. Write an ionic equation to show how trimethylamine acts as a base. State symbols are not required. (1)
- June 2025 (A), Unit 5, Q17(a) (3 marks): Explain why ethylamine is fully miscible with water. (3)
- June 2025 (A), Unit 5, Q17(b) (6 marks): Amines are derived from ammonia, which is a weak base. Explain the differences in the strengths of three bases: ammonia, methylamine and phenylamine. In your an
- January 2025, Unit 5, Q23(c)(i) (3 marks): Explain why the basicity of the nitrogen atoms in procaine is different. (3)
- January 2025, Unit 5, Q23(c)(ii) (1 mark): Procaine hydrochloride is made by reacting procaine with hydrogen chloride in a 1 : 1 ratio. Draw the structure of procaine hydrochloride, showing how the hydro
- January 2025, Unit 5, Q23(c)(iii) (2 marks): Explain why procaine hydrochloride is more soluble in aqueous solutions such as blood plasma than procaine. (2)
- October 2024, Unit 5, Q15(c) (2 marks): Butylamine reacts with ethanoyl chloride to form N-butylethanamide. Write an equation for this reaction using displayed formulae. (2)
- October 2024, Unit 5, Q15(d) (3 marks): Explain why butylamine is a stronger base than ammonia. (3)
- January 2024, Unit 5, Q14(c) (6 marks): In the final step of the synthesis, phenylamine reacts with either ethanoyl chloride or ethanoic anhydride. → N‑phenylethanamide + hydrogen chloride phenylamine
- October 2023, Unit 5, Q12 (1 mark): Which of these is the weakest base? A ammonia B butylamine C ethylamine D phenylamine
- June 2023, Unit 5, Q25(b)(i) (2 marks): Write an equation, using molecular formulae, for this reaction. State symbols are not required. (2)
- June 2023, Unit 5, Q25(b)(ii) (2 marks): Explain by considering both nitrogen atoms in procaine which nitrogen is more likely to be protonated in the reaction with hydrochloric acid. (2) O N O H2N
- January 2023, Unit 5, Q16 (1 mark): The organic compound 4-aminophenol can behave as an acid and a base. HO NH2 What is formed when 4-aminophenol reacts with hydrochloric acid? A HO NH3 + B +H2O N
- October 2022, Unit 5, Q13 (1 mark): When dilute hydrochloric acid is added to butylamine and the solution is allowed to evaporate to dryness, a white solid forms. What is the formula of the white
- October 2022, Unit 5, Q17 (1 mark): The structures of cocaine and its metabolite benzoylecgonine are shown. O O O OH N N O O O O cocaine benzoylecgonine How would you expect the solubility of coca
- June 2022, Unit 5, Q12(e) (3 marks): Explain how the structures of ethanoyl chloride, CH3COCl, and compound A enable them to react forming 2‑ethanoylaminobenzoic acid in Step 5. (3)
- January 2022, Unit 5, Q11(b) (4 marks): The compound pyridine is used in the synthesis of chlorpheniramine. N pyridine Like many amines, pyridine is miscible with water and the solution formed is alka
- October 2021, Unit 5, Q13 (1 mark): Which sequence shows these compounds in order of decreasing basicity? A C6H5NH2 > CH3CH2CH2NH2 > NH3 B NH3 > CH3CH2CH2NH2 > C6H5NH2 C CH3CH2CH2NH2 > NH3 > C6H5N
- October 2021, Unit 5, Q21(f)(ii) (1 mark): Condensation with ethanoyl chloride. (1)
- October 2021, Unit 6, Q2(c)(i) (2 marks): Complete the statements in the observation and inference columns. (2) Test Observation Inference Test 3 2 drops of B were dissolved in 2 cm3 of water The colour
- June 2021, Unit 5, Q19(a)(i) (1 mark): Name the functional group present in X. (1)
- January 2021, Unit 5, Q13 (1 mark): Separate 0.1 mol dm−3 aqueous solutions of ammonia, butylamine and phenylamine were prepared. Which of the following sequences shows the solutions in order of i
- January 2021, Unit 5, Q24(a)(ii) (2 marks): Suggest why caffeine is a much weaker base than a primary amine such as ethylamine, even though the right-hand ring has two amine groups. (2)
- October 2020, Unit 5, Q8 (1 mark): What is an organic product of the reaction between ethylamine and chloroethane? A NH2CH2COCl B C2H5NH4 +Cl− C C2H5NHCOC2H5 D (C2H5)2NH2 +Cl−
- October 2020, Unit 5, Q22(b)(i) (3 marks): Explain why phenylamine is a weaker base than ammonia. (3)
- October 2020, Unit 5, Q22(b)(ii) (1 mark): State what is seen when a few drops of an aqueous solution of phenylamine are added to an aqueous solution containing Cu2+ ions. (1)
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